I was going to with this guitar, but cosmetically, I just really wanted the f-hole design again. Lots of builders do offer it but players are slow to change.
there is a part in the Benedetto book where he even says, one piece bridges are superior but most players are unwilling to forfeit the easy adjustment that come with a two-piece/thumbwheel bridge’
Think on the next two cedar guitars I will give it a shot. I have always loved the floral design of the Benedetto blue guitar
I think great guitars can be built either way. I’ve gotten to play some pretty amazing archtops(including a KP). They can all be good. I think it just offers you more options aesthetically and tonally. No one would argue a late 20’s L5 or a D’angelico are held back by having f-holes. I do think, though especially on a small instrument, it doesn’t always make sense to cut into prime soundboard real estate. Relocating a sound hole to the upper bout is a good solution and can look nice.
@paulmcevoy75 I'm curious what did you mean you said "sound ports I don't think they do what people think they do"? My experience is it just makes a guitar louder and opener to a player without losing much if any of the projection out front. It also changes the primary resonant frequency?...I think that's what I remember Craig B said...I didn't notice any effects of that change. Everyone that tried it, opened their eyes wide when they played the guitar and I put my hand over the soundport. For me, it made my guitar that much more enjoyable to hear when I play. To me, as a player, it's a win/win situation.
Josh, that uke is totally and completely gorgeous, wow.
To be honest I think I understand this slightly better than I can explain it, and I don't do either super well but really what the soundport is doing is altering the air flow and resonances in the guitar. It's operating in conjunction with the soundhole and interacts with the way the air moves and compresses in the guitar. And yeah, it definitely alters the main air resonance (known as T(1,1)1) It has to.
As far as I understand it, the main drivers of T(1,1)1 are the volume of the box of the guitar and the size of the soundhole. If you add in a soundport it's definitely altering that. This is all based on the principles of Helmholtz Resonators.
Ponder if you had a soda bottle filled with a certain amount of water and you blew across the hole in the top. It would have a certain pitch based on the volume of the bottle, the dimensions of the bottle and neck and the size of the hole at the top. It would be defined and fixed.
But if you drilled a hole in the side and inserted a straw, the pitch would change.
The initial pitch is the T(1,1)1 which is a fundamental part of the way an instrument sounds, and then you'd have a different T(1,1)1.
As to the specific changes, it gets more complicated. But it's definitely not just making the instrument sound "more" of anything, it's fundamentally changing the instrument. The different might be subtle or large but it's changing the instrument.
Guitars are really, really complicated acoustically and it's pretty much impossible to make a change without it affecting a lot of things.
My understanding of this comes from the work of Guiliano Nicoletti who has synthesized a lot of other material to make something that's understandable but I don't really have a mathematical brain so I really have to work hard to understand it. I definitely lean towards a more intuitive understanding of how guitars work but to the extent that I can wrap my brain around this stuff it has been very, very helpful. And Guiliano is friend as well so I get some free coaching.
I may be making errors here but suffice it to say, cutting a soundport in a guitar doesn't really just do one thing, it changes a lot of things in a guitar. It is also very difficult to A/B test any change we do in a guitar because our hearing is not super good at remembering things. But generally, if a guitar sounds good, it sounds good. I think that's at least one true thing to hold on to.
Additionally when you change the T(1,1)1 it also affect the T(1,1)2 The Monopole and the T(1,1)3 the back frequency as well. So it's definitely altering a lot of the guitar.
Comments
I would like to build one in the future but they feel a little intimidating. This is time consuming. But if you take your time, it’s not hard.
here are a few shots of the Uke and some progress shots of the build I’m doing right now
I would like to do that. And it makes sense too.
I was going to with this guitar, but cosmetically, I just really wanted the f-hole design again. Lots of builders do offer it but players are slow to change.
there is a part in the Benedetto book where he even says, one piece bridges are superior but most players are unwilling to forfeit the easy adjustment that come with a two-piece/thumbwheel bridge’
Think on the next two cedar guitars I will give it a shot. I have always loved the floral design of the Benedetto blue guitar
I love bird's eye!
Re: sound ports I don't think they do what people think they do, and I'm not necessarily a fan. I need to do more research.
But the KP quote doesn't make much sense. The sides ideally don't vibrate a lot. So you're not taking much away i
That looks super cool. Archtop is definitely more work.
I think great guitars can be built either way. I’ve gotten to play some pretty amazing archtops(including a KP). They can all be good. I think it just offers you more options aesthetically and tonally. No one would argue a late 20’s L5 or a D’angelico are held back by having f-holes. I do think, though especially on a small instrument, it doesn’t always make sense to cut into prime soundboard real estate. Relocating a sound hole to the upper bout is a good solution and can look nice.
@paulmcevoy75 I'm curious what did you mean you said "sound ports I don't think they do what people think they do"? My experience is it just makes a guitar louder and opener to a player without losing much if any of the projection out front. It also changes the primary resonant frequency?...I think that's what I remember Craig B said...I didn't notice any effects of that change. Everyone that tried it, opened their eyes wide when they played the guitar and I put my hand over the soundport. For me, it made my guitar that much more enjoyable to hear when I play. To me, as a player, it's a win/win situation.
Josh, that uke is totally and completely gorgeous, wow.
To be honest I think I understand this slightly better than I can explain it, and I don't do either super well but really what the soundport is doing is altering the air flow and resonances in the guitar. It's operating in conjunction with the soundhole and interacts with the way the air moves and compresses in the guitar. And yeah, it definitely alters the main air resonance (known as T(1,1)1) It has to.
As far as I understand it, the main drivers of T(1,1)1 are the volume of the box of the guitar and the size of the soundhole. If you add in a soundport it's definitely altering that. This is all based on the principles of Helmholtz Resonators.
Ponder if you had a soda bottle filled with a certain amount of water and you blew across the hole in the top. It would have a certain pitch based on the volume of the bottle, the dimensions of the bottle and neck and the size of the hole at the top. It would be defined and fixed.
But if you drilled a hole in the side and inserted a straw, the pitch would change.
The initial pitch is the T(1,1)1 which is a fundamental part of the way an instrument sounds, and then you'd have a different T(1,1)1.
As to the specific changes, it gets more complicated. But it's definitely not just making the instrument sound "more" of anything, it's fundamentally changing the instrument. The different might be subtle or large but it's changing the instrument.
Guitars are really, really complicated acoustically and it's pretty much impossible to make a change without it affecting a lot of things.
My understanding of this comes from the work of Guiliano Nicoletti who has synthesized a lot of other material to make something that's understandable but I don't really have a mathematical brain so I really have to work hard to understand it. I definitely lean towards a more intuitive understanding of how guitars work but to the extent that I can wrap my brain around this stuff it has been very, very helpful. And Guiliano is friend as well so I get some free coaching.
https://en.wikipedia.org/wiki/Helmholtz_resonance
I may be making errors here but suffice it to say, cutting a soundport in a guitar doesn't really just do one thing, it changes a lot of things in a guitar. It is also very difficult to A/B test any change we do in a guitar because our hearing is not super good at remembering things. But generally, if a guitar sounds good, it sounds good. I think that's at least one true thing to hold on to.
Additionally when you change the T(1,1)1 it also affect the T(1,1)2 The Monopole and the T(1,1)3 the back frequency as well. So it's definitely altering a lot of the guitar.